Acetylene-gas tip.



Patented lan. 9, |900.

E. J. DOLAN. ACETYLENE GAS TIP. (Application led Jan. 3, 1899. Renewed Aug. 16. 1899.) No Model.) 2 Shams-Sheet l.

Patented lan. 9, |900.

E. J. DLAN. ACETYLENE GAS TIP. (Applicaion led Jan. 3, 1899. Renewed Aug. 16, 1899.', (No Model.) 2 Sheets-Sheet 2.

PATENT EETCE.

EDVARD J. DOLAN, OF PHILADELPHIA, PENNSYLVANIA.

ACETYLENE-GAS TIP.

SPECIFICATON forming pare of Letters Patent No. 640,886, dated January o, 1900.

Application filed January 3,1899. Renewed August 16, 1899. Serial No. 727,444. (No model.)

To all whom, t may concern:

Be it known that I, EDWARD J. DOLAN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Methods of and Processes for Producing a Flat Smokeless Acetylene-Gas Flame; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements in methods of burning acetylene gas; and the invention has for its object the provision of a method or process whereby a fiat and smokeless flame may be produced at all times and under varying degrees of gas-pressure by the use of a single slotted burner, in the construction of which burner no provision is had for the admission of air.

Heretofore it has been found to be impossible to produce a flat and smokeless ame in burning either acetylene gas or other gases which are rich in hydrocarbons in a gasburner the tip of which has been provided with a single combustion-slot. Various expedients have been resorted to with the View of accomplishing this end; but as far as Ihave been able to discover no practical method has heretofore been perfected wherebya fiat and smokeless flame may at all times and under varyingv degrees of gas-pressure be assured by the use of a single-tip gas-burner.

With the View of producing a fiat flame in burning acetylene gas expensive burners of the duplex type have been proposed, the gas-passages at the tips of the burners being small round openings and the two burners being inclined toward one another, so that the two jets of gas upon leaving the burner-tips would impinge upon each other at a point a considerable distance from the burner-tips, and thus produce a flat Hanne when ignited. This style of burner has been found to'be objectionable on account of the expense incident to manufacture, the tendency 0f the minute round openings in the burner-tips to become clogged, and the extreme care that is at all times required to insure the impingement of the gas-jets at the proper angle, as it has been found that the slightest deviation of the'meeting jets of gas from proper alinement or deviation from the proper angle of contact will serve to defeat the end in view-t'. e., the production of a uniform, flat, and smokeless flame.

Various expedients have been resorted to with the view of producin ga single-tip burner adapted for use in producing a dat, uniform, and smokeless flame under varying degrees of gas-pressure. A burner of this general character is shown in Patent No. 597,057, granted to me January 1], 1898, in which burner provision is had for the admission of air into the interior of the burner; butI have found that in practice this plan is impracticable.

The present invention is the result of longcontinued experiments in the construction of gas-burners especially designed for bmah-IER..

acetylene gas with the View of producing a fiat flame which will at all times and under varyin g degrees of gas-pressure be absolutely smokeless, and I have discovered as the resultof my experiments that a certain Xed relationship or combination must exist between the parts of the burner, in determining which the depth, the width, and radius of the slot, the provision of a gas-chamber communicating with the slot, and other features of lconstruction are necessarily considered, as

will hereinafter be more fullydescribed,shown in the accompanying drawings, and then speciiically dened in the appended claims.

It is to be understood that the slot is arcshaped and that by the term radius of the slot I mean the distance from the point indicated by the numeral 1 to the point indicated by the numeral 2, as shown in Fig. 3 of the drawings, and that by the term depth of the slot I refer to the distance between the point indicated by the numeral 2 and that indicated by the numeral 3 in said Fig. 3 of the drawings. It will be also understood that in no instance in which lthe depth of the slot is mentioned do I include the widened entrance or space intervening between the upper edge of the slot and the extreme tip of the burner.

IOO

The general form of burner which I employ in carrying out my process or method is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which drawings- Figure lis a perspective view of a gas-b u rner embodying my invention. Fig. 2 is a top plan view of the burner shown in Fig. l. Fig. 3 is a vertical section of the burner, taken at right angles to the slot. Fig. i is a vertical section taken through the slot of the burner shown in Fig. l. Figs. 5, 6, and 7 are central vertical sections taken through modiiied forms of the burner. Figs. 8 and 9 are perspective and vertical sections, respectively, of another forni of burner embodying my invention; and Fig. l0 is a perspective view showing the grouping of several burner-tips on a single burner.

In carrying out myinvention I have found that in order to produce a iiat, uniform, and at all times smokeless flame in burning acetyiene gas and other gases which are rich in hydrocarbons it is necessary that the Width of the slot in the burner-tip shall be of not more than fourteen one-thousandths (i155) of an inch and that the depth of the slot must be less than thirty one-thousandths (lu) of an inch and that the radius of the slot must in no case exceed three-sixteenths (Tag) of an inch, and I have also discovered that there must exist an exact relationship between the width of the slot, the radius of the slot, the depth of the slot, and the position of the gaschamber and that a change in either of these will necessitate corresponding changes inthe others. I have also found that in the construction of the burner it is essential that a hollow gas-chamber must be provided immediately below the slot. This chamber, how-` ever, may be arranged upon either one or both sides of the slot, as may be preferred.

In constructing the burner I preferably use the material known as lava, such as is commonly used in the manufacture of lava tips.

Referring to the accompanying drawings, it will be seen that in the construction of the burner illustrated in Figs. l to 4, inclusive, a chamber A is provided, with which chamber the slot B communicates. The lower portion of the slot B, which communicates directly with the gas-chamber A, is exceedingly contracted, it being of a width not exceeding fourteen one-thousandths (T5-5T) of an inch; but for the purpose of more clearly illustrating the construction I have in the drawings shown the slot of relatively greater width, It will be observed that at a point which is substantially thirty one-thousandths (fig-0) of an inch above the gas-chamber A a Vshaped recess communicates at its apex with the slot, so as to produce a seat for the flame upon the tip of the burner a considerable distance above the exceedingly-contracted slot for the passage of the gas, the object of this construction being to obviate the possibility of the gas-passage becoming clogged by deposition of carbon, as, owing to the fact that the slot is so exceedingly contracted, would otherwise be likely to occur.

Itis at once evident that gas-burners involving the essential and necessary features of myinvention are subject to numerous modiiications without departing from the spirit of my invention. I have in Figs. 5 to 9, inclusive, illustrated some of these modifications. It will be observed upon reference to said iigures that in all of them the essential features-vl. e., the contracted slot B, the gaschamher A adjacent thereto, the walls of a thickness depending upon the Width of the gas-slot, and the widened opening B above the slot to insure a seating of the liame at a point removed from the slot, as described in connection with the construction shown in Figs. l to 4, inclusive-are shown.

My experiments have demonstrated that a deviation in the construction of the burner from the relative dimensions of the slot as to its width and radius, the thickness of the Walls of the slot, or the position of Vthe gaschamber relative to the slot will result in the production either of a smoking or imperfect iiame, depending, of course, upon the change that is made in the construction of the burner. I have also found that if any of the dimensions above specied are increased beyond the limit specified herein an imperfect and smoking flame is produced, and in order in burning acetylene gas to produce a iiat, uniform, and smokeless flame under all the varying degrecs of gaspressure to which the burner may be subjected it is absolutely necessary that in the construction of the burner the dimensions which I have specified be rigidly adhered to. I have found thatthe same results are obtained by the use of either of the modied forms of burners illustrated in the accompanying drawings, and my object in showing these modifications is mainly to illustrate the simplicity of construction. For instance, in constructing the burner shown in Figs. 1 to 4, inclusive, it is simply necessary to bore a hole transversely through the tip to' form the gas-chamber, the ends of the hole being afterward plugged, as shown in Fig. 3. The vertical gas-passages are then bored upward from the base of the tip. From this description the means of producing the other forms of burners shown will be at once api parent.

Having thus described my invention, what l claim to be new, and desire to secure by Letters Patent, is-

l. A burner-tip for acetylene gas, the same consisting of a body portion provided with a gas-chamber, a gas-passage communicating with said chamber, a slot leading outward from said chamber, said slot having a width of less than fourteen one-thousandths (T5-3v of an inch, a radius of less than three-sixteenths (T55) of an inch, and having a depth of less than thirty one-thousandths (Tg3-Q of IOO IIO

iame, of greater Width than the slot, substantially as described, and for the purpose specified.

3. A gas-tip of the dimensions described in combination with a gas-chamber intersecting at right angles the gas-outlet, said gas-chamber being of greater length than Width.

In testimony whereof I affix my signature in presence of two Witnesses.

EDWARD J. DOLAN.

Witnesses: FRANKLIN H. HOUGH, A. L. HoUGH. 

